# Tag Info

1 vote

### Statistical Inference on Samples vs Populations

You write "I want to know if this change (2%) can be attributable to randomness or non-randomness (i.e. statistically significant)." But "statistical significance" is not merely a ...
• 4,802
1 vote

### Statistical Inference on Samples vs Populations

I already wrote in comments that chances are applying any standard test to the example situation would be misleading/invalid even in case that the "2nd interpretation" is taken. However in ...
• 26.1k
1 vote

### Why is my pvalue for chisquared test so high?

It's not clear where your doubt arises. The standard error of your proportion (either one) under $H_0$ is $\sqrt{\frac{1\times 3}{4\times 4 \times 100000}}\approx 0.00137$. Meanwhile the "error&...
• 286k
Accepted

### Why is my pvalue for chisquared test so high?

Whether you meant to do this or not, your null hypothesis is that there is a 3:1 ratio. Indeed, there is such a 3:1 ratio at the population level, and your empirical data show roughly a 3:1 ratio. ...
• 65k

### How to show that many functions (a hundred, a thousand) have the same shape an distribution of values over an interval?

Based on your description 0.4 +ve derivative from zero to 0.4 and around zero or slightly negative derivative up to 1. You could fit $y = a_0 + a_1 x + a_2 (x-0.4)^+$, which is a piecewise linear ...
• 7,268
Accepted

### How to show that many functions (a hundred, a thousand) have the same shape an distribution of values over an interval?

A Q-Q plot approach would not be appropriate for your objective. Not only that, it would give you misleading results. This is because a Q-Q plot changes the order of the data, arranging it in ...
• 1,849
1 vote

### The F-test and the t-test reject the null hypothesis while the KS test and the Chi-Squared test do not

The lack of rejection by those tests is not a confirmation of their null hypotheses. What the lack of rejection means is that there is insufficient evidence for that particular test to refute the null ...
• 65k

### Statistical Inference on Samples vs Populations

You wrote, "I want to know if this change (2%) can be attributable to randomness or non-randomness [....]". That may sound, on the surface, to be equivalent to asking whether the two groups ...
• 12.8k
1 vote

• 26.1k

### t-test for partially paired and partially unpaired data

Building on Frank's comment on Apr 7, 2012 at 15:51, about "gls", below is a small example using gls from R package nlme. As correlation structure I used heterogeneous compound symmetry. ...
• 1,838
1 vote
Accepted

• 1,849